Safe Street. Quiet Bike. Easy Target.
The alarm lock you'll actually leave on. Wind can't set it off. A thief can.
LoudLock: Alarmed Disc Lock
The alarm lock you'll actually leave on.
- False alarms in the wind→Thief-Only Trigger
- Batteries that die→Sealed Rechargeable Core
- Never sure it's armed→Armed-Confirm Signal
Save up to $35 with a multi-lock bundle.
Front & Rear needs a drilled brake disc on both wheels. Not sure about your bike? Email your model to info@eupasy.com and we'll check.
Tracked delivery to your door in 4–7 days.
"Wonderful at locking front brake disc and makes a loud very annoying siren if you touch the lock after putting it on the bike!!!"
"I love this lock. I really like the way the alarm goes off. When you try to mess with a lock. One of the best products I've ever bought."
"This thing is cool it is easy to use and is heavy duty. It has already paid for itself"
🛡️ Description
Why most alarm locks end up switched off (and the one you'll leave on)
You lock it. You set the alarm. Then one night it goes off for nothing… and the battery comes out.
Here's what nobody selling "110dB" locks will tell you.
1. Your "safe street" is exactly where they look
"I live in a fairly safe suburb but I guess you never know."
That's what most of us think. Then we read stories like this one.
In Arizona, a newspaper columnist had two motorcycles stolen right out of his driveway. They were chained and locked together. They weren't easy to see from the street.
The thieves came ready anyway. They brought a tool to cut the chain. They even brought an air pump to fill a flat tire. (Yuma Sun, Feb 2024)
As he put it: "Clearly, they scoped out the driveway ahead of time."
Thieves don't pick at random. They pick the bike that looks easy.
2. If it goes, it's probably gone for good
Only 41% of stolen US motorcycles are ever recovered. (NICB, 2025) That means about 6 in 10 never come home.
Not the bike you saved for. Not the one you've ridden for years. Not your pride and joy.
That's why protecting it is your job. You can't count on getting it back.
3. You can't make it impossible to steal. You can make them skip it.
You've heard it: "If they want it, they'll take it."
There's some truth in that. No lock stops a thief with all night and a truck.
But most thieves don't want a fight. They want a quick getaway.
"You want it to be a deterrent. They move on."
So make your bike the hard one. The loud one. The one they walk past.
4. The Steel Myth
When riders give up on an alarm lock, it's rarely the steel. It's because the alarm cries wolf, the battery dies, or you can't tell it's on. So it gets switched off.
A switched-off alarm is just a heavy piece of metal.
5. The Always-On System
LoudLock fixes the three reasons riders switch their alarms off.
- Thief-Only Trigger. It ignores the wind, the rain and a flapping cover. It gets loud when someone moves your bike or messes with the lock.
- Sealed Rechargeable Core. No battery door to fight. No batteries to buy. Charge it like your phone. About 2 hours of charging lasts 5–6 months.
- Armed-Confirm Signal. One beep and you know it's on. No guessing.
Don't take our word for it. Watch the test ▶
6. Made to fit your bike, and not to hurt it
- The reminder cable runs from the lock to your bars. You can't ride off without seeing it. No bent rotors. No tip-overs.
- Fits nearly every brake disc. Cheap disc locks fail at fit: the pin is too thick for the holes, or the jaw won't reach the rotor. LoudLock is built to the standard every brake disc is drilled to:
- 7mm locking pin. Slides straight through the standard holes on nearly every drilled brake disc, from a scooter to a full-size cruiser or touring bike.
- 65mm (6.5cm) slot depth. Measured from the pin to the back of the jaw. Deep enough to seat over the rotor and line up with the holes, on a thin scooter disc or a thick front disc.
- Rain and snow ready. It lives on your bike, not in your garage.
- Fits under the seat. Driveway, motel lot, coffee stop. It goes where your bike goes.
🔒 What's In The Box
Everything you need, straight out of the box.
- 1×LoudLock alarm disc lock. The Always-On System, ready to clamp on your brake disc.
- 2×Keys. One for your keyring, one to keep safe at home.
- 1×Reminder cable. Loops from the lock to your bars, so you never ride off with it on.
- 1×USB-C charging cable. About 2 hours of charging lasts 5–6 months.
🔧 How To Use
3 simple steps to secure your ride.
- 1Position the lock. Slide the LoudLock onto your front brake disc and push the pin through a hole.
- 2Arm the alarm. One beep and you know it's on. Walk away worry-free.
- 3Remove before riding. Unlock it and stow it under the seat. The reminder cable keeps you from riding off with it on.
✅ Shipping & Guarantees
- Free US shipping. The price you see is the price you pay.
- Ships within 3 days and arrives in 4–7 days, with tracking.
- 90-day guarantee. Leave it on for 90 days. Love it, or send it back free.
- Free US returns. Doesn't fit your bike, or you just don't like it? Send it back. No hassle.
- Questions? Email us at info@eupasy.com.
You'll find look-alike alarm locks all over Amazon and TikTok. Only the Eupasy LoudLock comes with a 90-day guarantee, free US shipping, free US returns, and delivery in 4–7 days.
It was never the steel.
Riders don't complain that their alarm lock was too weak. They complain about the alarm. So they switch it off. Here's why, and how LoudLock stays on.
Even wind can set it off.One 3 a.m. false alarm and the battery comes out.
Drained its battery in a month.Or you fight the battery door for minutes.
They might not have activated it.
Safe street? That's exactly where they look.
"I live in a fairly safe suburb but I guess you never know." That's what most of us think.
Bikes. Chained together. Gone.
In Arizona, a newspaper columnist had two motorcycles stolen right out of his driveway. The thieves brought a tool to cut the chain, and an air pump for a flat tire. "Clearly, they scoped out the driveway ahead of time."
Yuma Sun, Feb 2024Stolen bikes never come home.
Only 41% of stolen US motorcycles are ever recovered. Not the bike you saved for. Not your pride and joy. You can't count on getting it back.
NICB, 2025They skip the hard, loud bike.
"If they want it, they'll take it." Maybe. But most thieves want a quick getaway, not a fight. "You want it to be a deterrent. They move on."
Rider, zx6r.com forumQuiet in the wind. Loud on the move.
LoudLock fixes the three reasons riders switch their alarms off.
- Thief-Only TriggerIgnores the wind, the rain and a flapping cover. Gets loud when someone moves your bike or messes with the lock.
- Sealed Rechargeable CoreNo battery door to fight. No batteries to buy. Charge it like your phone. About 2 hours of charging lasts 5–6 months.
- Armed-Confirm SignalOne beep and you know it's on. No guessing.
Riders already told us why alarm locks fail.
"After the damn thing went off at 0300… the alarm and battery came out."
"Even wind can set it off."
"You want it to be a deterrent. They move on."
The alarm lock you'll leave on
Versus the alarm locks riders give up on.
Based on the most common complaints in alarm lock reviews and rider forums.
Made to fit your bike, and not to hurt it.
- 🔗The reminder cableRuns from the lock to your bars. You can't ride off without seeing it. No bent rotors. No tip-overs.
- 📏Fits nearly every brake discA 7mm pin and a 65mm (6.5cm) deep jaw, built to the standard every brake disc is drilled to. If your disc has holes, it fits. Front or rear. If it doesn't, send it back free.
- 🌧️Rain and snow readyIt lives on your bike, not in your garage.
- 🏍️Fits under the seatDriveway, motel lot, coffee stop. It goes where your bike goes.
Leave it on for 90 days. Love it, or send it back free.
If it doesn't fit your bike, or you just don't like it, return it. Free US returns. No hassle.
- Free US shipping
- Free US returns
- Tracked delivery in 4–7 days
- Real support team: info@eupasy.com
Your biggest questions, answered
Will the wind or rain set it off and wake my neighbors?+
No. The Thief-Only Trigger is built to ignore wind, rain and a flapping cover. It sounds when the bike is moved or the lock is tampered with. Watch the test video to see it.
Will it go off if someone sits on my bike?+
A bump or a nudge, like someone leaning on your bike or a truck rumbling past, gets a few short warning beeps, not the full siren. If they keep at it, like trying to move the bike or mess with the lock, it switches to the full alarm. Clever enough to tell a nudge from a thief.
How do I know it's armed?+
You'll hear one beep when it arms. No more wondering if it's on.
Will it fit my bike?+
Almost certainly. LoudLock has a 7mm locking pin and a 65mm (6.5cm) deep jaw, built to the standard nearly every brake disc is drilled to, from scooters to full-size cruisers and touring bikes. If your brake disc has holes, it fits, front or rear. Still unsure? Email your bike model to info@eupasy.com and we'll check. And if it doesn't fit, send it back free.
What if I forget it's on and ride off?+
That's what the reminder cable is for. Clip it from the lock to your bars, and you'll see it before you ride.
How long does a charge last? How do I charge it?+
Plug it in like your phone with the included USB-C cable. A full charge takes about 2 hours and lasts about 5–6 months. No batteries to buy.
How loud is it?+
110dB. An ear-splitting alarm, loud enough to make a thief think twice and turn heads down the street.
Can it be cut or broken off?+
No lock is impossible to beat. LoudLock is built to make thieves skip your bike: it's hard to move, hard to get a cutter into, and loud the moment they try.
Will it fit under my seat?+
Yes. It's compact enough to fit under most seats, so it goes everywhere your bike goes: driveway, motel lot, coffee stop.
Why not just buy Kryptonite or Xena?+
They're good brands. But owners of alarm locks keep running into the same three problems: false alarms, dead batteries, and not knowing if it's armed. LoudLock is built around fixing those, so it's the alarm lock you'll actually leave on.
Is this just a cheap gadget with a new label?+
Absolutely not. Our focus is on quality, reliability, and everyday practicality, not just putting a logo on another motorcycle accessory.
A quality disc lock should offer solid construction, dependable locking, reliable alarm performance, and convenient everyday use.
We believe motorcycle security deserves more than a cheap gadget. That's why we prioritize lasting quality, practical protection, and peace of mind every time you park. Because protecting your motorcycle shouldn't mean compromising on quality.
How fast is shipping? How do returns work?+
Orders ship within 3 days and arrive in 4–7 days, with tracking. If you don't love it within 90 days, send it back free.
Safe Street. Quiet Bike. Easy Target.
Make yours the loud one they walk past.